Answer:
F Anthracite (the hardest coal)
Explanation:
Coal is a sedimentary rock that is formed from plant materials. These plant materials must have been trapped and compacted in an environment where they are not able decay. Such an environment is a swamp.
The first grade of coal that forms initially in such an environment is called PEAT. Peat is soft coal that still contains some plant materials. It has a high moisture content and the amount of carbon is still quite low.
With increasing pressure and compaction, PEAT grades into LIGNITE which has more carbon atoms in it. Lignite is more combustible although it is quite soft too. Lignite grades into SUB-BITUMINOUS coal and then BITUMIOUS coal.
The highest grade of coal is ANTHRACITE which is a hard coal. It has very little moisture content and rich carbon percentage in it. Anthracite yields more energy compared to other forms of coal. Anthracite is basically coal that forms at the greastest pressure. Beyond this pressure, a metamorphic transformation occurs and the coals changes to graphite.
Based on increasing pressure:
PEAT< LIGNITE< BITUMINOUS COAL < ANTHRACITE
It's easy.
145=2x-5
150=2x
x=75
Answer:
Ang pagbabago ng klima ay may malaking epekto sa iba't ibang mga panlipunang aspeto ng buhay.
Explanation:
Ang pagbabago ng klima ay may malaking epekto sa iba't ibang mga panlipunang aspeto ng buhay. Ang mga damit na isusuot namin nang direkta ay nakasalalay sa klima ng aming rehiyon. Habang nagbabago ang klima ng rehiyon ng rehiyon, nagbabago rin ang kagustuhan ng suot na damit. Habang nangyayari ang pagbabago ng klima sa mundo, tumaas ang pandaigdigang temperatura at ang mga sosyal na aspeto ng buhay ay nagbabago din sa pagbabagong ito ng klima. Maraming mga tao na hindi magparaya sa pagtaas ng temperatura na lumipat sa mga cool na lugar at pagbabago ay nangyayari sa kanilang mga panlipunang aspeto ng buhay tulad ng wika at kaugalian atbp.
Answer:
the inner core is solid because S-waves stop at the inner core. The strong magnetic field is caused by convection in the liquid outer core.
Explanation:
